Swiftech MCP35X 12VDC Pump

"The pump housing: - has been redesigned to provide considerably enhanced hydraulic performance; - is compatible with multiple tubing options thanks to the adoption of the G1/4 port standard; - can host an optional "built-in" reservoir; - is also sold separately, and remains compatible with all MCP3XX series pumpsThe motor: - is now PWM compatible, allowing variable speed control thru the motherboard from 1300 to 4500 rpm."